[FFmpeg-cvslog] avcodec/diracdec: Fix integer overflow in INTRA_DC_PRED()

[Michael Niedermayer]

ffmpeg | branch: release/3.1 | Michael Niedermayer <michael at niedermayer.cc> | Fri Sep  1 19:56:10 2017 +0200| [93a32c15a84936064afc89a3333ce5aea9e6c8c1] | committer: Michael Niedermayer

avcodec/diracdec: Fix integer overflow in INTRA_DC_PRED()

Fixes: runtime error: signed integer overflow: 1168175789 + 1168178473 cannot be represented in type 'int'
Fixes: 3081/clusterfuzz-testcase-minimized-4807564879462400
Fixes: 2844/clusterfuzz-testcase-minimized-5561715838156800

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
(cherry picked from commit 2a0823ae966be3ad40e5dba6ec4c4dc1e8c6bcad)
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=93a32c15a84936064afc89a3333ce5aea9e6c8c1
---

 libavcodec/diracdec.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavcodec/diracdec.c b/libavcodec/diracdec.c
index 6f6a0ece45..f92ff1b2ea 100644
--- a/libavcodec/diracdec.c
+++ b/libavcodec/diracdec.c
@@ -594,7 +594,7 @@ static inline void codeblock(DiracContext *s, SubBand *b,
     } \
 
 INTRA_DC_PRED(8, int16_t)
-INTRA_DC_PRED(10, int32_t)
+INTRA_DC_PRED(10, uint32_t)
 
 /**
  * Dirac Specification ->